I'd use a control group. My own eggs which I know are good against shipped eggs. If my eggs hatch then I'd know the shipped eggs aren't good. Try to buy eggs from folks as close to you as possible.
Now I do have an article on shipping that I offer if you send me your e-mail address. It's from PP magazine and has helped me.
Some important things just off the top of my head that I did wrong in the beginning.
No high traffic areas. No the bedroom is not safe if you go in and out alot.
Use a room that maintains a 70-80* temp. Put in a heater if need be. Do not trust the thermostat , they lie. I have a thermometer on the wall in my office. Keep the door closed.
The temp can go up to 101.5 or even 102.0 and may not present a problem. Temps will fluctuate. Lord have mercy a hen doesn't have a thermometer and gets off her eggs at least once a day. Don't panic.
Do not count on day 21. I've had chicks hatch early and some late, taking 4 or 5 days to complete. I have snatched chicks from the incubator and not had a shrink wrap situation. I use the Genesis 1588. Scientifically the shrink wrap idea doesn't make sense , since a hen is up and off and an incubator has air holes in the bottom. At least mine does.
IMO, if your using a store bought styrofoam incubator raise the temp to 100.0* or even 101.0* But as always follow the directions.
I wish you the best,
Rancher